1, Manifold (interior): red copper 2, Manifold (exterior): aluminum alloy 3, Glass tube dimensions: 58mm x 1.8m / 47mm x 1.5m 4, Heat preservation: 72hrs 5, Hail resistance: 25mm 6, max pressure: 6 bar 7, Coating of vacuum tube: SS-C/CU 8, Heat Pipe: anti-freezing > -40ˇăC
